CN204061662U - A kind of powder metallurgy brake block of improvement - Google Patents
A kind of powder metallurgy brake block of improvement Download PDFInfo
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- CN204061662U CN204061662U CN201420223434.3U CN201420223434U CN204061662U CN 204061662 U CN204061662 U CN 204061662U CN 201420223434 U CN201420223434 U CN 201420223434U CN 204061662 U CN204061662 U CN 204061662U
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- brake block
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Abstract
The utility model relates to a kind of powder metallurgy brake block, the powder metallurgy brake block of particularly a kind of improvement.It comprises steel backing, skeleton, some brake pads, brake shoe nose and block, and all brake pad sintering form brake block on the same backbone, and frame welding is on steel backing.The utility model adopts polylith brake pad to be welded on a monoblock skeleton simultaneously, then by monoblock frame welding on steel backing, its friction area is large, structure is simple, easy to process, the process-cycle is short, cost is low, brake block can not loosen and come off, Security is high.
Description
Technical field
The utility model relates to a kind of powder metallurgy brake block, the powder metallurgy brake block of particularly a kind of improvement.
Background technique
Need braking in railway locomotive and vehicle operation, direct friction wheel makes the braking component of vehicle parking be exactly brake shoe.The brake shoe that tradition uses has three types, i.e. cast iron brake shoe, composite brake shoe and powder metallurgy brake block.Cast iron brake shoe weight is large, use noise is high, wearing and tearing are large; Composite brake shoe heat dispersion is poor, has pollution to environment; Cast iron brake shoe and composite brake shoe generally can only for the locomotive of speed per hour lower than 120KM, and working life is short, along with the raising of locomotive speed, brake shoe performance is had higher requirement, namely require that brake shoe not only has good braking ability, and require not produce irregular wear and damage, adverse effect is not produced to the adhesion between wheel track, free from environmental pollution, powder metallurgy brake block then can meet above requirement.Chinese patent ZL97215240.7 discloses a kind of power metallurgy quasi-high-speed brake shoe, and it comprises three little steel backing, and on three little steel backing, pressure sintering copper ferrous powder metal becomes three friction blocks, and three friction blocks and skeleton adopt rivet to rivet.This patented technology adopts pressure sintering copper ferrous powder metal on three little steel backing to become three friction blocks, three friction blocks are riveted with skeleton again, there is following defect in it: on skeleton, 1, applies pressure when brake pad is contacted with wheel tread, the pressure that skeleton bears is very huge, easily ruptures; 2, adopt riveting method, brake pad and skeleton easily to come off, Security is not high, and adopts riveting method, and rivet can take up room, and also may interfere with miscellaneous part, affect the performance of brake shoe.Chinese patent ZL01229371.7 discloses a kind of powder metallurgy brake block, and it comprises an arc skeleton, has by the shaping friction material block of metallic dust at the inner face direct sintering of skeleton arc.It is compared with Chinese patent ZL97215240.7, and it eliminates steel backing, but brake pad direct sintering on skeleton, when sintering, sintering temperature is very high, and steel backing very easily deforms, and reject rate is high, and brake shoe is extremely short for working life, and Safety performance is very poor.
In addition, market also has a kind of powder metallurgy brake block, to be that more than one piece friction piece 4 is equidistant be before sintering arranged on same skeleton A3 part brake block, skeleton A3 part is plane, connection between brake block and steel backing A1 adopts following three kinds of modes: as shown in Figure 1, the first is that brake block and steel backing adopt riveting method.As shown in Figure 2, the second way is that riveted joint adds welding, is actually and welds in brake block surrounding on the basis of the first riveting method.As shown in Figure 3, the third structure is the welded structure in using at present, is on the second architecture basics, cancel brake block riveted joint, retains the welding of brake block periphery.The common trait of these three kinds of structures as shown in Figure 4, every part brake shoe has more than one piece brake block, its brake block is combined by a brake pad and a skeleton and forms through pressure sintering, the more equidistant setting of more than one piece part brake block is welded on steel backing.All there is some deficiency in the brake lining of above-mentioned three kinds of Placements, the first riveted structure is that brake block is riveted on steel backing, riveted holes need be processed on brake block and steel backing, in order to process riveted holes at brake block, the area of brake pad on brake block must be reduced thus expose skeleton, because friction area reduces, add the development difficulty of braking material.Meanwhile, in braking process, brake block rubbing surface and wheel tread produce the high temperature that rubs, and distortion or fracture easily appear in rivet, and easily cause brake block to occur to loosen and dropping situations, poor stability, the brake shoe of current this riveted structure is substantially superseded.The second is that riveted joint adds welded structure because the process-cycle is long and processing cost is higher, and brake shoe manufacturer abandons this structure gradually.The third welded structure is the brake shoe structure in using at present, is on the second architecture basics, cancel brake block riveted joint, and retain the welding of brake block periphery, namely left and right brake block welds three sides, as shown in Figure 5.And the brake block of centre is due to little with left and right sides brake block gap, brake block left and right sides can not be welded, both sides, front and back can only be welded, simultaneously, operator weld in the middle of brake block time, because gap is little, inconvenient operation, sometimes there is the situation of rosin joint, cause the connecting welding intensity of middle brake block upper skeleton and steel backing low, in braking process, cause the brake block in the middle of brake shoe to come off, as shown in Figure 6, its reliability is low, affects traffic safety.
Model utility content
For above technological deficiency, the purpose of this utility model is the powder metallurgy brake block providing a kind of improvement.It adopts polylith brake pad to be welded on a monoblock skeleton simultaneously, then by monoblock frame welding on steel backing, its friction area is large, structure is simple, easy to process, the process-cycle is short, cost is low, brake block can not loosen and come off, Security is high.
To achieve these goals, the utility model is by the following technical solutions:
A kind of powder metallurgy brake block of improvement, comprise steel backing, skeleton, some brake pads, brake shoe nose and block, all brake pad sintering form brake block on the same backbone, frame welding is on steel backing, described brake block is made up of three ~ five pieces of brake pads and one piece of skeleton, brake pad powder compaction, by welding equidistant after pressurized high-temperature sintering on the same backbone, in the middle of on brake block, the skeleton of brake pad both sides is curved shape, bending deflection point or line are II and III, II and III and skeleton both sides I and IV 4 or line all on same radius of arc R, and radius of arc R is identical with steel backing radius of arc, forniciform brake block is welded on steel backing Inner arc curved surface along surrounding, brake shoe nose and block are also welded in steel backing external arc curved surface groove simultaneously.
Described brake pad is three pieces.
Compared with prior art, the utility model has following beneficial effect:
It is high temperature resistant at about 200km/h that the utility model provides a kind of speed per hour, wear and tear little, brake block and brake pad do not loosen and fall the bending welding brake shoe structure of block, because the while of employing more than one piece brake pad, temperature-pressure sintering forms an one integral piece brake block on a skeleton, reinforing function is played to skeleton, make skeleton not easy-rupturing, one monoblock brake block carries out welding with a monoblock steel backing again and can strengthen steel backing tensile strength, can effectively prevent steel backing from rupturing, and can avoid adopting in prior art more than one piece brake pad high temperature pressing to sinter on more than one piece skeleton, form more than one piece brake block and cause locomotive in frequent braking process, there is the phenomenon come off in the middle brake block on brake shoe, eliminate traffic safety hidden danger.In addition, more than one piece brake pad is simultaneously once sintered on same cuboid skeleton, does not need to process the less little skeleton of single-piece of more than one piece, and manufacturing process is simple, and the process-cycle is short, can realize automatic production, and can also improve the overall performance of brake shoe.
Accompanying drawing explanation
Fig. 1 is brake shoe riveted structure schematic diagram;
Fig. 2 is brake shoe riveted joint, welded structure schematic diagram;
Fig. 3 is brake shoe welded structure schematic diagram;
Fig. 4 is that brake pad and skeleton combine schematic diagram;
Fig. 5 is middle brake block welding schematic diagram;
Fig. 6 is that brake block comes off schematic diagram in the middle of brake shoe welded structure;
Fig. 7 is the utility model structural representation;
Fig. 8 is the utility model brake block sintering pre-structure schematic diagram;
Fig. 9 is the utility model brake pad and skeleton surface of contact schematic diagram;
Figure 10 is the utility model brake block bending deflection four point (line) position view;
Figure 11 is the utility model brake block and steel backing welded structure figure;
Figure 12 is the utility model brake block warp architecture schematic diagram;
Figure 13 is the utility model welding brake shoe nose and stop block structure schematic diagram;
Figure 14 is that the utility model brake block is fixedly welded on structural representation on steel backing;
In figure: steel backing A1, brake block 11, rivet 2, skeleton A3, friction piece 4, welding 5, riveted joint 6, the left and right sides do not weld 7, both sides, front and back welding 8, brake pad 1-1, skeleton 2-2, steel backing 3-3, brake shoe nose 4-4, block 5-5, surface of contact 9, bending deflection place 10.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but claimed scope is not limited to content described in the present embodiment.
As shown in figs. 7-14, the utility model is a kind of powder metallurgy brake block of improvement, comprise steel backing 3-3, skeleton 2-2, some brake pad 1-1, brake shoe nose 4-4 and block 5-5, all brake pad 1-1 sintering form brake block 11 on same skeleton 2-2, and skeleton 2-2 is welded on steel backing 3-3.
Described brake block 11 is made up of three ~ five pieces of brake pad 1-1 and piece skeleton 2-2, brake pad 1-1 powder compaction, equidistantly be welded on same skeleton 2-2 after being sintered by pressurized high-temperature, in the middle of on brake block 11, the skeleton 2-2 of brake pad both sides is curved shape, bending deflection point or line are II and III, II and III and skeleton both sides I and IV 4 or line all on same radius of arc R, and radius of arc R is identical with steel backing 3-3 radius of arc, forniciform brake block 11 is welded on steel backing 3-3 Inner arc curved surface along surrounding, brake shoe nose 4-4 and block 5-5 is also welded in steel backing 3-3 external arc curved surface groove simultaneously.
Described brake pad 1-1 is three pieces.
The utility model is undertaken producing by the following mode of production and obtains.
As shown in Figure 8, powder compaction is become brake pad 1-1, metallic material is machined into skeleton 2-2, the equidistant setting of brake pad 1-1 is also bundled on skeleton 2-2, is welded on skeleton 2-2 by pressurized high-temperature after being sintered, and forms brake block 11.As shown in Figure 9, keep plane after the processing of skeleton 2-2 part, can not have distortion or buckling phenomenon, guarantee brake pad 1 and skeleton 2 surface of contact 9 area are in maximum, and after guaranteeing brake block 11 pressure sintering, brake pad 1-1 is connected with skeleton 2-2 and does not occur segregation phenomenon.As shown in fig. 10 and fig. 12, pass through External Force Acting, bending deflection is carried out to the intermediate friction block 1-1 two side skeleton 2-2 position of the brake block 11 after sintering, bending deflection place is 10, two places bending deflection point (line) II and III and the radius of arc that forms of totally 4 points (line) is identical with steel backing 3-3 radius of arc with IV in skeleton 2-2 both sides I.As shown in figure 13, then on steel backing 3-3, process the groove of welding brake shoe nose 4-4, and process the groove of welding block 5-5 in brake shoe nose 4-4 groove bilateral symmetry position simultaneously, brake shoe nose 4-4 and block 5-5 is inserted into outside steel backing 3-3 circular arc in groove respectively, welding brake shoe nose 4-4 and block 5-5.Finally, as shown in figure 14, in the circular arc shaped inside of steel backing 3-3, brake block 11 is fixed on steel backing 3-3, brake block 11 upper skeleton 2-2 and steel backing 3-3 is welded along surrounding.
Claims (2)
1. the powder metallurgy brake block improved, comprise steel backing (3-3), skeleton (2-2), some brake pads (1-1), brake shoe nose (4-4) and block (5-5), it is characterized in that: all brake pads (1-1) sintering forms brake block (11) on same skeleton (2-2), skeleton (2-2) is welded on steel backing (3-3), described brake block (11) is made up of three to five pieces of brake pads (1-1) and one piece of skeleton (2-2), brake pad (1-1) powder compaction, equidistantly be welded on same skeleton (2-2) after being sintered by pressurized high-temperature, in the middle of brake block (11) is upper, the skeleton (2-2) of brake pad both sides is curved shape, bending deflection point or line are II and III, II and III and skeleton both sides I and IV 4 or line all on same radius of arc R, and radius of arc R is identical with steel backing (3-3) radius of arc, forniciform brake block (11) is welded on steel backing (3-3) Inner arc curved surface along surrounding, brake shoe nose (4-4) and block (5-5) are also welded in steel backing (3-3) external arc curved surface groove simultaneously.
2. the powder metallurgy brake block improved as claimed in claim 1, is characterized in that: described brake pad (1-1) is three pieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420223434.3U CN204061662U (en) | 2014-05-04 | 2014-05-04 | A kind of powder metallurgy brake block of improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420223434.3U CN204061662U (en) | 2014-05-04 | 2014-05-04 | A kind of powder metallurgy brake block of improvement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204061662U true CN204061662U (en) | 2014-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420223434.3U Expired - Fee Related CN204061662U (en) | 2014-05-04 | 2014-05-04 | A kind of powder metallurgy brake block of improvement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204061662U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061260A (en) * | 2014-05-04 | 2014-09-24 | 贵州新安航空机械有限责任公司 | Powder metallurgy brake shoe with bent welded structure |
| CN104963971A (en) * | 2015-06-30 | 2015-10-07 | 贵州新安航空机械有限责任公司 | Powder metallurgy brake shoe structure and machining method thereof |
-
2014
- 2014-05-04 CN CN201420223434.3U patent/CN204061662U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061260A (en) * | 2014-05-04 | 2014-09-24 | 贵州新安航空机械有限责任公司 | Powder metallurgy brake shoe with bent welded structure |
| CN104963971A (en) * | 2015-06-30 | 2015-10-07 | 贵州新安航空机械有限责任公司 | Powder metallurgy brake shoe structure and machining method thereof |
| CN104963971B (en) * | 2015-06-30 | 2018-09-14 | 贵州新安航空机械有限责任公司 | A kind of powder metallurgy brake block structure and its processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20180504 |
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| CF01 | Termination of patent right due to non-payment of annual fee |